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import { Token, AnalyzeEnvSourceCode } from "lib/env/lexer";
import {
ParsedEnvDocument,
ParseEnvTokens,
VariableDeclarationNode,
RawLiteralNode,
QuotedLiteralNode,
NodeType,
IdentifierNode,
QuoteType,
NewlineNode,
} from "lib/env/parser";
import { Render } from "lib/env/renderer";
import fs from "fs";
import path from "path";
import { NewlineType, Options } from "lib/options";
import { FileNotFoundError } from "./error";
export type NodeFs = Pick<typeof fs, "existsSync" | "readFileSync" | "writeFileSync">;
export type NodePath = Pick<typeof path, "resolve">
const ENCODING = "utf8";
export interface MergerInterface {
merge: (options: Options) => void
}
export class Merger implements MergerInterface {
private cliPrompter: CliPrompterInterface
private analyzeEnvSourceCode: AnalyzeEnvSourceCode
private parseEnvTokens: ParseEnvTokens
private render: Render
private fs: NodeFs
private path: NodePath
public setCliPrompter(cliPrompter: CliPrompterInterface): this {
this.cliPrompter = cliPrompter
return this
}
public setAnalyzeEnvSourceCode(analyzeEnvSourceCode: AnalyzeEnvSourceCode): this {
this.analyzeEnvSourceCode = analyzeEnvSourceCode
return this
}
public setParseEnvTokens(parseEnvTokens: ParseEnvTokens): this {
this.parseEnvTokens = parseEnvTokens
return this
}
public setRender(render: Render): this {
this.render = render
return this
}
public setFs(fs: NodeFs): this {
this.fs = fs
return this
}
public setPath(path: NodePath): this {
this.path = path
return this
}
public async merge (options: Options) {
const distDocument = this.parseDistDocument(options);
const localDocument = this.parseLocalDocument(options);
const mergedDocument = await this.mergeDocuments(distDocument, localDocument, options);
this.writeLocalEnvFile(options, mergedDocument);
}
private analyzeDistEnvFile (path: string): Token[] {
const exists = this.fs.existsSync(path);
if (!exists) throw new FileNotFoundError().setFilePath(path);
const src = this.fs.readFileSync(path, { encoding: ENCODING }).toString();
return this.analyzeEnvSourceCode(path, src);
}
private analyzeLocalEnvFile (path: string): Token[] {
const exists = this.fs.existsSync(path);
if (!exists) return [];
const src = this.fs.readFileSync(path, { encoding: ENCODING }).toString();
return this.analyzeEnvSourceCode(path, src);
}
private writeLocalEnvFile (
options: Options,
document: ParsedEnvDocument
) {
const fileContent = this.render(document.abstractSyntaxTree, options);
// TODO use resolved absolute path here
this.fs.writeFileSync(options.localFilePath, fileContent, { encoding: ENCODING });
}
private async mergeDocuments (
distributedDocument: ParsedEnvDocument,
localDocument: ParsedEnvDocument,
options: Options
): Promise<ParsedEnvDocument> {
const newLocalDocument: ParsedEnvDocument = { ...localDocument };
let hasBeenPrompted = false;
const variableNames = Object.keys(distributedDocument.variablesByName);
for (const name of variableNames) {
const existsLocally = name in localDocument.variablesByName;
if (existsLocally) continue;
if (!hasBeenPrompted && options.prompts) {
this.cliPrompter.promptUserAboutNewVariables();
hasBeenPrompted = true;
}
const distributedVariable = distributedDocument.variablesByName[name];
const defaultValue = getValueFromVariable(distributedVariable);
let value = defaultValue
if (options.prompts) {
const userInputEnvironmentVariable = await this.cliPrompter.promptUserForEnvironmentVariable({
name,
value: defaultValue,
});
value = userInputEnvironmentVariable.value
}
const variable = createVariableDeclaration(name, value, options);
addVariableToDocument(variable, newLocalDocument);
}
return newLocalDocument;
}
private parseDistDocument (options: Options): ParsedEnvDocument {
const path = this.path.resolve(options.distFilePath)
const tokens = this.analyzeDistEnvFile(path);
return this.parseEnvTokens(path, tokens, options);
}
private parseLocalDocument (options: Options): ParsedEnvDocument {
const path = this.path.resolve(options.localFilePath)
const tokens = this.analyzeLocalEnvFile(path);
return this.parseEnvTokens(path, tokens, options);
}
}
const addVariableToDocument = (
variable: VariableDeclarationNode,
document: ParsedEnvDocument
) => {
document.abstractSyntaxTree.statements.push(variable);
const newline: NewlineNode = { type: NodeType.newline };
document.abstractSyntaxTree.statements.push(newline);
const { name } = variable.identifier;
document.variablesByName[name] = variable;
};
const getValueFromVariable = (variable: VariableDeclarationNode): string => {
const hasValue = !!variable.value;
if (!hasValue) return "";
const hasRawLiteral = variable.value.type === NodeType.literal;
if (hasRawLiteral) {
const rawLiteral = variable.value as RawLiteralNode;
return rawLiteral.value;
}
const quotedLiteral = variable.value as QuotedLiteralNode;
const hasContent = !!quotedLiteral.content;
if (!hasContent) return "";
return quotedLiteral.content.value;
};
const createVariableDeclaration = (
name: string,
value: string,
{ newlineType }: Options
): VariableDeclarationNode => {
const identifier: IdentifierNode = { type: NodeType.identifier, name };
const isEmpty = !value;
if (isEmpty) return { type: NodeType.variableDeclaration, identifier };
const hasNewlines = value.indexOf('\n') > -1 || value.indexOf('\r') > -1
const hasSingleQuotes = value.indexOf("'") > -1;
const hasDoubleQuotes = value.indexOf('"') > -1;
const isQuoted = hasSingleQuotes || hasDoubleQuotes;
if (hasNewlines || isQuoted) {
const hasSingleAndDoubleQuotes = hasSingleQuotes && hasDoubleQuotes;
const quoteType =
hasSingleAndDoubleQuotes || hasSingleQuotes || hasNewlines
? QuoteType.double
: QuoteType.single;
const valueWithSafeDoubleQuotes =
hasSingleAndDoubleQuotes ? value.replace(/"/g, '\\"') : value;
const valueWithConvertedNewlines =
hasNewlines
? getContentWithNewlineType(valueWithSafeDoubleQuotes, newlineType)
: valueWithSafeDoubleQuotes;
const rawLiteral: RawLiteralNode = {
type: NodeType.literal,
value: valueWithConvertedNewlines,
};
const quotedLiteral: QuotedLiteralNode = {
type: NodeType.quotedLiteral,
quoteType,
content: rawLiteral,
};
return {
type: NodeType.variableDeclaration,
identifier,
value: quotedLiteral,
};
}
const rawLiteral: RawLiteralNode = { type: NodeType.literal, value };
return { type: NodeType.variableDeclaration, identifier, value: rawLiteral };
};
const getContentWithNewlineType = (content: string, newlineType: NewlineType): string => {
const isWindows = newlineType === NewlineType.windows
const newlineChar = isWindows ? '\r\n' : '\n'
return content.replace(/(?:\r\n)|(?:\r)|(?:\n)/g, newlineChar)
}
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